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Thread: Disposal of DE from Backwashing

  1. Back To Top    #1

    Join Date
    Oct 2007
    Philadelphia, PA

    Disposal of DE from Backwashing

    This is my first year with a pool, which came with the house. The pool is about 12000 gal, in-ground, vinyl, with a 3/4 hp pump and DE filter. Figuring that DE came from the gound, I've been allowing the backwash water to flow onto the lawn. This leaves some DE on the surface, but it seems to be washed in after even a modest rain.

    Now I read that DE contains crystalline silica which is a carcinogen when inhaled. The sources state that used DE should be considered hazardous waste and disposed of accordingly. (See this MSDS, for example.) What do people do the backwash water from DE filters? If you do collect the used DE from the backwash water, how do you do this? What do you do with the DE after it's collected?

    Thanks all.
    11x27 in ground, vinyl pool
    ~12,500 gal
    PAC FAB (Pentair) Pinnacle 3/4 hp pump
    Pentair 24 sq ft DE filter
    One skimmer, one return (no main drain)

  2. Back To Top    #2

    Join Date
    Apr 2007
    The solution to pollution is dilution - just let it flow.
    20x40 IG vinyl, heatpump and solar and 3 siberian huskies, 10kw PV solar electric system. Nikon Photographer D800e dSLR.

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